Try adding things to the shelves, like boxes or books, some equipment ore storage crates stacked on the walls of the room, rubble decals to the floor or those cardbox debris things.
also add some pillars to the walls, the right one looks a bit plane.

What to improve? Oh man... I can't think of ANYTHING to improve. It looks amazing! The mood and lighting of this map is literally some of the best I've seen in Source. This is a complete gem of a map. There's detail, it's not blocky, it uses tons of sprites the right way, and it looks fun to play.

I think so. I found this room and a giant decal of a banana in my "abandoned maps" folder. I have an unhealthy habit of going into my abandoned maps and stealing things from them to put into my new maps when I'm lazy. it's dirty.

@iostream
That's great! I love the use of neon lights. One thing I noticed was that the fog render distance was unnaturally small and there's a light entity without an actual light prop in your fourth image, right above the stairs. What's the name of the map? I'd love to play it on release.

A lot of the corridors and areas just seem to be devoid of detail and don't feel "real." You could also tone down the color correction. It looks good at the moment but I bet you could achieve a more "subtle" effect.